Z Whip LS Engine Block Oil & Coolant Galley Plug & Cylinder head Dowel Pin Kit. Comes with 4ea Cylinder Head Dowel Pins, 1ea Oil Galley Barbell, 1ea Threaded Coolant Passage Plug, 3ea Threaded Oil Galley Plugs, and 1ea Press in Freeze Plug. Contains all Required Plugs for Completing an Engine Rebuild. LSX Blocks Require Additional Plugs. Compatible with ALL Chevrolet GM LS Series Engines 1997-2014 (99-2013 4.8L,5.3L,6.0L,6.2L Vortec Truck Engines) LS1, LS2, LS3, LS6, LS7, LS9, GM 4.8L 5.3L 6.0L 6.2L. Also Fits LSX LM7 LR4 LQ4 LQ9 L33 LH6 L92 L76 L99 L96 L82 L83 L84 L86 L87 Engines.